Re: 1973. The Israelis realized that the Syrian threat took precedence over pushing the Egyptians back over the canal and reacted as such. By Oct 9, the Syrians had in effect lost all gains other than Mt. Hermon.
On the Southern Front, had Gen. Shmuel Gonen not made his armored attack before waiting for infantry support, things would have looked better. Sharon who had planned for a canal crossing for several years, (he was against the Bar-Lev Line from the onset) was SUPPOSED to only secure the crossing site and allow a fresh tank division to roll thru his.
Ego and the delay of getting the bridging equipment to the canal caused the bulk of the casualities.
Sidenotes: of the 17 bunkers that made up the Bar-Lev Line, 4 were unoccuppied on Oct. 6. Of the 290 Israeli tanks that were SUPPOSED to be in the Sinai, less than 100 actually were anywhere near the canal. They had to contend with a crossing force of 5 infantry divisions, 1700 tanks.